The FBI agent removed from Robert Mueller’s Russia investigation for exchanging anti-Trump text messages also reportedly changed a legally significant phrase in former FBI Director James Comey’s description of Hillary Clinton’s mishandling of classified information on her private email server.

“Electronic records show Peter Strzok, who led the investigation of Hillary Clinton’s private email server as the No. 2 official in the counterintelligence division, changed Comey’s earlier draft language describing Clinton’s actions as ‘grossly negligent’ to ‘extremely careless,” CNN reported, citing U.S. officials familiar with the matter.

The shift in language is legally significant because “gross negligence” is the standard for prosecution under the relevant federal statute, 18 U.S.C. 793, according to Fox News chief intelligence correspondent Catherine Herridge.

“Although Director Comey’s original version of his statement acknowledged that Secretary Clinton had violated the statute prohibiting gross negligence in the handling of classified information, he nonetheless exonerated her in that early, May 2nd draft statement anyway, arguing that this part of the statute should not be enforced,” Grassley said in a letter to FBI Director Christopher Wray.

Comey said in a news conference in July 2016 that the FBI decided not to recommend pressing charges, because Clinton lacked the intent to mishandle classified information.

“Although we did not find clear evidence that Secretary Clinton or her colleagues intended to violate laws governing the handling of classified information, there is evidence that they were extremely careless in their handling of very sensitive, highly classified information,” Comey said.

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Grassley noted that is not what the statute required.

“The statute governing the mishandling of classified material establishes criminal penalties for ‘gross negligence.’ Comey’s May 2, 2016, draft stated that Clinton had been grossly negligent in handling classified information,” the senator wrote to Wray.

Grassley then requested of the FBI any records discussing why the change was made.

The Daily Caller’s Chuck Ross reported that Strzok also participated in the interviews of Hillary Clinton in July 2016, as well as those of her aides Cheryl Mills and Huma Abedin.

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NEW: Embattled FBI supervisor Peter Strzok also conducted the interviews with Huma Abedin and Cheryl Mills, in which they falsely claimed they didn't know about Hillary's email server when she was Secretary of State. https://t.co/EZ8B1rG6oq@dailycaller